1993 Geo Tracker transmission does not shif well till it wa

DNLCLEVELAND

1993 GEO TRACKER

Transmission problem
1993 Geo Tracker 4 cyl Four Wheel Drive Automatic 159000 miles
the transmission will not shift good till it warms up some then it shifts perfectly fine
have had fluid and filter replaced can there be some sort of temp sensor of top of transmission gone bad? Or any other idea what can be the problem thank you. Dnl